\begin{tikzpicture}
    \tkzDefPoints{0/0/A, 4/0/B, 0.5/1/C, 3.5/-1/D, 0.8/-1.1/F, 3.2/1.1/E, 2/0/O}

    \tkzDrawSegments(A,B  C,D  E,F)
    \tkzLabelPoints[below](A, B, D, F, O)
    \tkzLabelPoints[left](C)
    \tkzLabelPoints[right](E)
\end{tikzpicture}

